mirror of https://github.com/kirsle/kirsle.net
35 lines
854 B
Markdown
35 lines
854 B
Markdown
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# Regexp Basics
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A small reference for some basic things you can do with regular expressions
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that you can get a lot of mileage out of without getting too in the weeds with
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crazy features.
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Recommended links:
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* [Regexr](https://regexr.com/), an interactive regexp explorer.
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* [perlretut](https://metacpan.org/pod/distribution/perl/pod/perlretut.pod),
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where I learned regexp back in the day. It's Perl documentation but the
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regexp knowledge inside is universally applicable to other programming languages.
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This page includes examples and code snippets in various programming languages.
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## String Search (& Replace)
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The simplest regexps deal with just plain old raw text.
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```javascript
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// JavaScript
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"Hello world".match(/world/);
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```
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```perl
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# Perl
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"Hello world" =~ /world/;
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```
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```python
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# Python
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import re
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re.match(r'world', "Hello world")
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```
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